Enum aws_sdk_apigatewayv2::types::ProtocolType
source · #[non_exhaustive]pub enum ProtocolType {
Http,
Websocket,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against ProtocolType
, it is important to ensure
your code is forward-compatible. That is, if a match arm handles a case for a
feature that is supported by the service but has not been represented as an enum
variant in a current version of SDK, your code should continue to work when you
upgrade SDK to a future version in which the enum does include a variant for that
feature.
Here is an example of how you can make a match expression forward-compatible:
# let protocoltype = unimplemented!();
match protocoltype {
ProtocolType::Http => { /* ... */ },
ProtocolType::Websocket => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when protocoltype
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant ProtocolType::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
ProtocolType::Unknown(UnknownVariantValue("NewFeature".to_owned()))
and calling as_str
on it yields "NewFeature"
.
This match expression is forward-compatible when executed with a newer
version of SDK where the variant ProtocolType::NewFeature
is defined.
Specifically, when protocoltype
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on ProtocolType::NewFeature
also yielding "NewFeature"
.
Explicitly matching on the Unknown
variant should
be avoided for two reasons:
- The inner data
UnknownVariantValue
is opaque, and no further information can be extracted. - It might inadvertently shadow other intended match arms. Represents a protocol type.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Http
Websocket
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl ProtocolType
impl ProtocolType
source§impl ProtocolType
impl ProtocolType
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for ProtocolType
impl AsRef<str> for ProtocolType
source§impl Clone for ProtocolType
impl Clone for ProtocolType
source§fn clone(&self) -> ProtocolType
fn clone(&self) -> ProtocolType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ProtocolType
impl Debug for ProtocolType
source§impl Display for ProtocolType
impl Display for ProtocolType
source§impl From<&str> for ProtocolType
impl From<&str> for ProtocolType
source§impl FromStr for ProtocolType
impl FromStr for ProtocolType
source§impl Hash for ProtocolType
impl Hash for ProtocolType
source§impl Ord for ProtocolType
impl Ord for ProtocolType
source§fn cmp(&self, other: &ProtocolType) -> Ordering
fn cmp(&self, other: &ProtocolType) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for ProtocolType
impl PartialEq for ProtocolType
source§fn eq(&self, other: &ProtocolType) -> bool
fn eq(&self, other: &ProtocolType) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for ProtocolType
impl PartialOrd for ProtocolType
source§fn partial_cmp(&self, other: &ProtocolType) -> Option<Ordering>
fn partial_cmp(&self, other: &ProtocolType) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for ProtocolType
impl StructuralPartialEq for ProtocolType
Auto Trait Implementations§
impl Freeze for ProtocolType
impl RefUnwindSafe for ProtocolType
impl Send for ProtocolType
impl Sync for ProtocolType
impl Unpin for ProtocolType
impl UnwindSafe for ProtocolType
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more